Pandrol’s Under-Ballast Mats are continuous resilient mats for ballasted tracks designed to provide vibration mitigation and increase track quality.
The Under-Ballast Mats are installed directly beneath the ballast bed which may offer vibration isolation and protection of the track components. This layer of protection can reduce the frequency of required maintenance over the lifetime of the railway.
The Under-Ballast Mats are made of high quality resin-bonded rubbers. When used for vibration attenuation purposes and depending on design parameters, Under-Ballast Mat solutions can typically achieve attenuation levels of 15 to 20 dBv with reduced resonance frequency. As protection mat, the Under-Ballast Mats improve the load distribution in the track leading to a reduction of the stresses in the ballast and other track components.
Materials | Resin bonded rubber (RR family) Polypropylene non-woven geotextile |
Setup | Possible to install in single, double or double plus an underlayment layer |
Geometry | Flat or wavy Density range 710 – 1000 kg/m³ |
Supply | Rolls or sheets Joints |
Joints | Not needed |
Static bedding modules range | 18 – 267 MN/m³ according to DIN 45673-5 |
Dynamic bedding modules range | (10Hz) 26 – 429 MN/m³ according to DIN 45673-5 |
Thickness range | Single layer of the elastomer part: 10 – 30 mm, Non-woven protection layer: 1.8 mm |
Total system thickness | 11.8 – 51.8 mm |
DIN 45673-5